Spectroscopic Imaging - Scanning Tunneling Microscopy studies of the Nematic Metamagnet Sr$_3$Ru$_2$O$_7$

ORAL

Abstract

The metamagnetic perovskite Sr$_3$Ru$_2$O$_7$ can be tuned towards a putative quantum critical point in an external magnetic field, and in ultrapure samples, an electronic nematic forms in a small region of the phase diagram around this putative quantum critical point. Much insight about these phenomena in Sr$_3$Ru$_2$O$_7$ come from a wealth of high-quality thermodynamic experiments but little is known about the microscopic electronic origin of criticality and nematicity. We recently re-engineered our SI-STM to achieve sub-Kelvin temperatures and magnetic fields up to 9T, and are now imaging the local density of states in different regions of the Sr$_3$Ru$_2$O$_7$ phase diagram, including within the nematic phase.

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Authors

  • M.P. Allan

    • Cornell University, University of St. Andrews

  • T.-M. Chuang

    • Cornell University, National High Magnetic Field Lab

  • Y. Xie

    • Cornell University

  • A.W. Rost

    • University of St. Andrews

  • R.S. Perry

    • University of Edinburgh

  • J.-F. Mercure

    • University of Bristol

  • A. Gibbs

    • University of St. Andrews

  • A.P. Mackenzie

    • University of St. Andrews

  • J.C. Davis

    • LASSP, Dep. of Physics, Cornell University, Ithaca NY; CMPMS, Brookhaven National Laboratory, Upton, NY; University of St. Andrews, Fife, Scotland